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AECOM 4.4 Personal Protective Equipment(PPE) Wearing the right clothing is crucial to avoiding cold stress. The type of fabric also makes a difference. Cotton loses its insulation value when it becomes wet. Wool, on the other hand, retains its insulation even when wet.Adequate insulating dry clothing will be required in air or wind chill temperatures below 40°F (4.4°C) All PPE will comply with the requirements of S3AM-208-PRI Personal Protective Equipment and consider the following requirements: 4.4.1 Wear at least 3 layers of clothing to help prevent cold stress. It is important to preserve the air space between the body and the outer layer of clothing to retain body heat. • Wear a middle layer of down,wool, or similar materials to provide insulation. • Avoid cotton, especially blue jeans. • Wear an outer layer to break the wind and allow some ventilation (e.g., Gortex®or nylon) • Do not wear tight clothing. Loose clothing allows better ventilation. 4.4.2 Wear proper clothing, including head coverings and gloves or mittens for cold, wet, and windy conditions. 4.4.3 Wear a hat or hardhat liner. Up to 40 percent of body heat can be lost when the head is left exposed. 4.4.4 Use insulated footwear with adequate traction to prevent slips and falls. 4.4.5 Wear insulated boots or other insulated footwear, and insulated gloves to help reduce the chance of frostbite. 4.4.6 Keep a change of dry clothing available in case work clothes become wet. 4.4.7 Eye and face protection for employees employed outdoors in a snow and/or ice-covered terrain should be supplied. • Sunglasses(with UVA and UVB protection)and sunscreen should be used when there is a persistent combination of snow and direct sun. • Special safety goggles to protect against blowing ice crystals and ultraviolet light and glare (which can produce temporary conjunctivitis and/or temporary loss of vision)should be required when there is an expanse of snow coverage causing a potential eye exposure hazard. • Ensure face guards are used to protect skin in cold,windy conditions, including riding on an unshielded vehicle. 4.5 General Cold Stress Prevention Measures 4.5.1 In order to prevent hypothermia: • Wear appropriate clothing and PPE as determined by the weather conditions. • When active,ventilate excess heat by opening or removing outer layers of clothing to avoid sweating. o Start with the mitten or gloves, unless protection from ice, snow, or cold metal surfaces is needed. o Next remove head gear and neck wrappings. o Then coats/parkas should be opened at the waist and sleeves. o Finally, layers of clothing should be taken off. o When resting or tired, or colder conditions are encountered, add additional layers of clothing/close outer layers in the reverse of the above order, or get out of the cold. Have a sweet drink but do not indulge in heavy eating. Cold Stress (S3AM-112-PR1) Revision 2 July 31,2019 PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 5 of 9